CN112024457A

CN112024457A - Automatic PCB detection production line and use method thereof

Info

Publication number: CN112024457A
Application number: CN202010629687.0A
Authority: CN
Inventors: 王继荣; 李军; 刘华波
Original assignee: Qingdao University
Current assignee: Qingdao University
Priority date: 2020-07-02
Filing date: 2020-07-02
Publication date: 2020-12-04

Abstract

The invention relates to a PCB production line, in particular to a PCB automatic detection production line and a use method thereof. Including dividing board module, detection module, transport module, first manipulator, bar code scanner, second manipulator, NG board and depositing the district, transport module with divide the board module to link to each other, first manipulator, bar code scanner, detection module set up on transport module, and the second manipulator sets up on transport module deposits the district with NG board. The invention overcomes the defects of the traditional production line, realizes automatic detection, designs double-station board separation and detection and improves the detection efficiency. Most importantly, the layout of the production line is adjusted, and the accuracy of detecting the plate is improved. Meanwhile, the NG plates are automatically and sequentially arranged through the mechanical arm, so that workers can conveniently record and overhaul the NG plates, and the utilization rate of the plates is improved.

Description

Automatic PCB detection production line and use method thereof

Technical Field

The invention relates to a PCB production line, in particular to a PCB automatic detection production line and a use method thereof.

Background

At present, three methods are mainly used for PCB board separation detection, and one method is completely manual operation; the other is a semi-manual operation aiming at the improvement of the first; the last is splitting by milling. The first method is used more, and the traditional detection production line is completed by 7 persons. The PCB is electrically detected manually and then separated, and the quality of the PCB is recorded manually and placed separately. The production line needs more human resources, the yield is 600/hour, and the test efficiency is low. Moreover, the worker can be gradually tired in continuous work, and the detection accuracy is influenced.

The second method is that a worker puts the board into a detection device, the detection machine finishes the electrical detection of the PCB, the worker takes out the PCB after the detection is finished and records the good and bad boards, and finally the worker manually divides the boards and places the good and bad boards separately. Although the method improves the efficiency, the improvement is still insufficient, and the production requirement cannot be met.

The third method is that the electrical property detection of the PCB is finished by a detection machine, and then the PCB is divided by a milling cutter after the detection is finished. Although the method has high detection efficiency, when the PCB is divided by the milling cutter, the PCB can be damaged by the vibration caused by the milling cutter. And the milling cutter needs to be frequently replaced, so that the cost is high, and the enterprise benefit is influenced.

Most importantly, the three methods all have a fatal defect that the flow of detecting first and then dividing the plate cannot detect the damage of the plate dividing to the plate material, so that the detection accuracy is slightly poor. Some PCB boards damaged during board splitting may be caused to flow into the market, affecting company reputation.

The invention discloses an automatic PCB detection production line and a using method thereof, aiming at solving the problems of low detection efficiency, high cost and poor accuracy of the traditional production line.

Disclosure of Invention

In order to overcome the defects in the prior art, the invention provides an automatic PCB detection production line and a use method thereof.

The technical scheme of the invention is as follows:

the invention provides an automatic PCB detection production line which comprises a board dividing module, a detection module, a conveying module, a first manipulator, a code scanner, a second manipulator and an NG board storage area, wherein the conveying module is connected with the board dividing module, the first manipulator, the code scanner and the detection module are arranged on the conveying module, and the second manipulator is arranged on the conveying module and the NG board storage area.

Furthermore, the board separating module comprises a plurality of automatic board separating machines arranged side by side.

Further, the board separating module further comprises a feeding platform.

Further, automatic board separator includes cylinder, detachable cutter, lower mould, the cutter can be once with ten PCB platelets of PCB big board branch.

Further, the conveying module comprises a conveying support, a conveying belt and a servo motor.

Further, the conveying module further comprises a blanking platform.

Furthermore, the detection module comprises a plurality of detection machines arranged side by side, and the detection machines correspond to the automatic board separator one to one.

Further, the automatic PCB detection production line further comprises a control system.

A use method of an automatic PCB detection production line comprises the following steps:

(1) feeding, wherein a PCB large board produced in the previous process is conveyed to a feeding platform;

(2) the board splitting machine splits boards, and workers carry the PCB big boards to the automatic board splitting machine for splitting boards;

(3) carrying the PCB small plates, wherein the first mechanical arm carries the separated PCB small plates to a conveying belt;

(4) PCB scans the code, PCB platelet is conveyed forward under the function of the conveyer belt, discern the information of each platelet by the code scanner, and send the information scanned to the control system and carry on the data summarization;

(5) detecting the PCB, wherein the PCB is tested by a detection machine, and test information is uploaded to a control system;

(6) removing the damaged board, and picking out unqualified PCB small boards by the second mechanical arm according to the detection result of the detection machine and putting the unqualified PCB small boards into an NG board storage area in sequence; then, the finished PCB small plate is conveyed to a blanking platform;

(7) the PCB is well packaged, and a worker packages qualified small PCB plates;

(8) and (4) maintaining the PCB, and detecting and maintaining unqualified products.

The invention achieves the following beneficial effects:

the invention overcomes the defects of the traditional production line, realizes the manual production to the automatic production of the printed circuit board, and improves the detection quality and efficiency. And multi-station board separation and detection are realized, and the detection efficiency is further improved.

Meanwhile, the invention overturns the layout of the traditional production line, realizes the detection after the board division, greatly improves the detection accuracy, and prevents the PCB damaged by the board division from flowing into the market to influence the reputation of companies.

In addition, the invention sorts the printed circuit boards with unqualified quality on line by the mechanical hand, thereby preventing manual misoperation from causing unclear sorting of the printed circuit boards. Meanwhile, unqualified printed circuit boards are placed to the NG board storage area in sequence by the manipulator, so that workers can conveniently record and overhaul the printed circuit boards, and the utilization rate of the boards is improved.

Drawings

FIG. 1 is a general layout of a production line according to the present invention.

Fig. 2 is a front view of the inventive tool.

Fig. 3 is a bottom view of the inventive knife.

In the figure, 1, a feeding platform; 2. an automatic board separator; 3. a first manipulator; 4. a code scanner; 5. a conveyor belt; 6. a detector; 7. a second manipulator; 8. a blanking platform; 9. an NG board storage area; 10. and (4) a cutter.

Detailed Description

To facilitate an understanding of the present invention by those skilled in the art, specific embodiments thereof are described below with reference to the accompanying drawings.

As shown in FIGS. 1 to 3, the invention provides an automatic PCB detection production line, which is a linear production line with a total length of 3m, a width of more than 1m and a height of 3 m. The plate dividing module comprises a plurality of automatic plate dividing machines 2 arranged side by side and a feeding platform 1 arranged at the feeding ends of the automatic plate dividing machines 2. The number of the automatic board separator 2 is determined according to the production task amount of a factory, and the automatic board separator can be one, two or even more. Preferably, the number of the automatic plate dividing machines 2 is two in combination with the consideration of cost and efficiency. One automatic board separator 2 corresponds to one station, namely, the preferred invention adopts double-station arrangement. In addition, when the present invention adopts a plurality of automatic board separators 2, part of the parts on the automatic board separators 2 can be shared to reduce the cost, for example, the side wall where the two automatic board separators 2 contact can be omitted.

The automatic board separator 2 comprises a shell, an air cylinder, a detachable cutter 10 and a lower die, wherein the air cylinder, the detachable cutter 10 and the lower die are arranged in the shell, the cutter 10 is arranged on a piston rod of the air cylinder, and the lower die corresponds to the cutter. The cutter 10 can divide a large PCB into ten small PCB boards at a time to increase work efficiency. The cutter 10 can be quickly replaced according to different PCB boards to be produced, so that the flexibility of the production line is improved, and the operation cost of enterprises is reduced. During production, a worker carries the PCB to the lower die, and the cutter 10 moves downwards under the action of the cylinder to divide the PCB into ten small boards.

The conveying module comprises a conveying support, a conveying belt 5, a servo motor and a discharging platform 8, the conveying belt 5 and the servo motor are arranged on the conveying support, the servo motor is connected with the conveying belt 5 and used for driving the conveying belt 5 to operate, one end of the conveying belt 5 is connected with the discharging end of the automatic plate separator 2, and the discharging platform 8 is arranged at the other end of the conveying belt 5. The first mechanical arm 3, the code scanner 4 and the detector 6 are arranged on the conveying support, and the second mechanical arm 7 is arranged on the conveying support and the NG plate storage area 8.

The first mechanical arm 3 and the second mechanical arm 7 respectively comprise a support, a longitudinal girder arranged on the support, a cross beam, a mechanical arm, a cylinder arranged on the mechanical arm, and a mechanical arm arranged at the tail end of a piston rod of the cylinder. The transverse beam is provided with a first sliding groove, a first rack, a first sliding block matched with the first sliding groove, a first driving gear meshed with the first rack and a longitudinal moving motor connected with the first driving gear, and the transverse beam can move back and forth along the first sliding groove under the driving of the longitudinal moving motor. The cross beam is further provided with a second sliding groove and a second rack, the mechanical arm is provided with a second sliding block matched with the second sliding groove, a second driving gear meshed with the second rack, and a transverse moving motor connected with the second driving gear, and the mechanical arm can be driven by the transverse moving motor to move left and right along the cross beam. Therefore, the manipulator realizes the degrees of freedom in three directions of XYZ under the combined action of the longitudinal moving motor, the transverse moving motor and the air cylinder, and can reach a specified position under the action of the control system. In order to facilitate grabbing, a plurality of suckers or grippers are arranged on the manipulator, and the manipulator can grab ten small PCB plates at a time.

The detection module comprises a plurality of detection machines 6 arranged side by side, and the detection machines 6 correspond to the automatic board separator 2 one by one. Preferably, the detection module is provided with two detection machines 6, and can detect two groups of PCB platelets simultaneously. Also, when the present invention employs a plurality of inspection machines 6, a part of the components on the inspection machines 6 can be shared to reduce the cost. Most parts of the detector 6 are the same as those of the existing detector, and the difference is that the detector 6 comprises a pressing cylinder and a needle bed arranged at the tail end of a piston rod of the pressing cylinder, a plurality of elastic probes are arranged on the needle bed, and the arrangement of the probes corresponds to the test points on the PCB one by one. When the detection device is used, the PCB is driven by the conveyor belt 5 to move to the position below the needle bed, the needle bed moves downwards under the action of the pressing cylinder, the elastic probes are contacted with detection points on the PCB, whether open circuit or short circuit caused by insufficient soldering and false soldering exists on the PCB is detected, and the detection result is transmitted to the control system.

Further, the automatic PCB detection production line further comprises a control system, and the control system comprises an upper computer, a PLC (programmable logic controller) and a management system running on the upper computer. The upper computer is connected with the PLC, and the PLC is connected with the automatic board separator 2, the first manipulator 3, the code scanner 4, the second manipulator 7 and the detector 6. The upper computer can be used for managing the invention, adjusting the running rhythm of each device of the invention, setting the running speed, the running position and the like of the manipulator, gathering information, recording the number and the serial number of good boards and bad boards and providing a basis for enterprise management. The PLC controller plays a role in network connection, can connect the upper computer with various devices on the production line, and can directly control the various devices on the production line to work. Preferably, the model of the PLC controller is: siemens S7-1200.

A use method of an automatic PCB detection production line comprises the following specific processes:

(1) feeding, wherein a PCB (printed Circuit Board) produced in the previous process is conveyed to a feeding platform 1;

(2) the board splitting machine splits boards, workers on each station carry the PCB big boards to the automatic board splitting machine 2 on the corresponding station to split the boards, and the time for completing the board splitting of the PCB for one time is estimated to be 4 s;

(3) carrying the PCB small plates, wherein the first mechanical hand 3 firstly carries the PCB small plates which are already cut on one automatic plate separator 2 onto a conveyor belt 5, and then carries the PCB small plates which are already cut on the other automatic plate separator 2 onto the conveyor belt 5 until all the PCB small plates are carried;

(4) PCB scans the code, PCB platelet is conveyed forward under the influence of the conveyer belt 5, discern the information of each platelet (printed the two-dimensional code number on each platelet in the previous PCB large-scale board production process already) by the bar code scanner 4, and send the information scanned to the control system and carry on the data summarization;

(5) detecting the PCB, wherein the detection machine 6 tests the PCB small plate and uploads test information to a control system, and the test for one time is expected to need 15 s;

(6) the defective board is eliminated, firstly, the second mechanical hand 7 picks up PCB small boards which are unqualified in detection according to the indication of the control system and sequentially puts the PCB small boards into an NG board storage area 9, and then, the finished PCB small boards are conveyed to a blanking platform;

(7) the PCB is well packaged, and a worker packages qualified small PCB plates;

It is noted that each process in the production line is in tact. For example, a customer requests ten thousand products to be produced in a day, the time of each product in each process is fixed, which is the production cycle. Therefore, in the invention, as long as the operation speed of the manipulator is increased, the manipulator can completely serve the production requirements of two stations, thus the balance of efficiency and cost is achieved, and the production efficiency is improved by nearly one time.

The above-described embodiments of the present invention do not limit the scope of the present invention. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the scope of the claims of the present invention.

Claims

1. The utility model provides an automatic production line that detects of PCB board which characterized in that: including dividing board module, detection module, transport module, first manipulator, bar code scanner, second manipulator, NG board and depositing the district, transport module with divide the board module to link to each other, first manipulator, bar code scanner, detection module set up on transport module, and the second manipulator sets up on transport module deposits the district with NG board.

2. The automatic PCB detection production line of claim 1, wherein: the board separating module comprises a plurality of automatic board separating machines arranged side by side.

3. The automatic PCB detection production line of claim 2, wherein: the board separating module further comprises a feeding platform.

4. The automatic PCB detection production line of claim 3, wherein: the automatic board separator comprises an air cylinder, a detachable cutter and a lower die, and the cutter can divide a PCB large board into ten PCB small boards at a time.

5. The automatic PCB detection production line of claim 1, wherein: the conveying module comprises a conveying support, a conveying belt and a servo motor.

6. The automatic PCB detection production line of claim 5, wherein: the conveying module further comprises a blanking platform.

7. The automatic PCB detection production line of claim 4, wherein: the detection module comprises a plurality of detection machines which are arranged side by side, and the detection machines are in one-to-one correspondence with the automatic board separator.

8. The automatic PCB detection production line of claim 1, wherein: the automatic PCB detection production line further comprises a control system.

9. The use method of the PCB board automatic detection production line according to any one of claims 1 to 8, characterized in that: the method comprises the following steps:

(7) the PCB is well packaged, and a worker packages qualified small PCB plates;